(context, astronomy, calendar studies) A particular approximate common multiple of the tropical year and the synodic month; in other words, the 19-year period over which the lunar phases occur on the same dates.

According to the Metonic Cycle, a lunar calendar begins on the same solar date every 19 years.

Translations:

French: Cycle métonique

German: Metonischer Zyklus

Etymology: Meton + -ic + cycle

Supplemental Details:Sponsor an extended definition for metonic cycle for as little as $10 per month. Click here to contact us.